Eye Drops for Welding Flash: What Actually Helps?

It’s 9 p.m. on a Tuesday, and a fabricator you know finally puts down the phone and admits the truth: his eyes have been on fire since midnight. He welded all afternoon with the hood tipped up, felt fine, and now he can barely look at a lamp. What he’s describing isn’t a burn to the eyeball itself — it’s UV damage to the cornea, the same injury as a sunburn on the front of his eye — and by the time the pain shows up, the only thing eye drops can do is make the wait more bearable while the surface heals.

What Welding Flash Actually Does to Your Eyes

That Tuesday night phone call is the classic arc-eye story, and it is worth connecting to what is actually happening in the eye. Welding flash is not a burn to the eyeball itself and it is not a chemical burn. It is ultraviolet damage to the thin layer of cells covering the front of the cornea, and medically it behaves like a sunburn that lands on your eye while you are asleep. What makes it feel so violent is timing: the injury happens immediately, but the pain arrives hours later, after the damaged cells die and slough off, exposing the nerve network underneath.

Two pieces of good news. First, this is usually temporary: the College of Optometrists clinical management guideline for photokeratitis notes that it “gets better by itself and there is usually no permanent damage.” Second, it is almost entirely preventable, the subject of the prevention section later in this guide. What you cannot do is undo the exposure you already took.

Why the Pain Shows Up Hours Later

The cornea is covered by a transparent layer of cells called the corneal epithelium. It is thin, it regenerates quickly, and it is one of the most heavily innervated tissues in the human body, which is why it reacts so violently to a scratch, a grain of dust, or a bad arc exposure.

According to EyeWiki’s photokeratitis entry, the corneal epithelium absorbs almost 100 percent of ultraviolet light below 290 nm, the UV-C band at the short end of the spectrum. That near-total absorption is the whole mechanism. UV energy is captured in a very thin layer of cells, and the absorbed radiation triggers cell death through apoptosis. The dead and dying cells do not vanish on the spot. They are held in place for hours, then slough off the surface, exposing the bare cornea and the sub-epithelial nerve plexus beneath it. That exposed nerve plexus is the source of the intense pain, tearing, and light sensitivity.

That sequence explains the story above: a welder can feel completely fine at the end of a shift and still not be able to look at a lamp by midnight.

Typical Onset and Recovery Window

Timing varies, and the guidelines reflect that. The College of Optometrists guideline places typical symptom onset at 6 to 12 hours after arc exposure, with symptoms usually resolving within 24 to 48 hours. EyeWiki gives a wider range of roughly 30 minutes to 12 hours for symptom appearance, which makes sense because it depends on exposure duration, arc intensity, distance from the arc, and how much of the cornea was exposed. Most shop-floor cases land in the middle of that window, which is why people describe the pain as “coming on in the middle of the night.”

Healing follows the same logic. Because the epithelium sheds and re-grows rather than scarring, the eye typically re-epithelializes within 24 to 72 hours. That is the window where eye drops and comfort measures help most, because they protect and soothe a raw, healing surface.

The Full Symptom List

The American Academy of Ophthalmology lists these symptoms of photokeratitis, and most people experience a cluster rather than just one:

• Pain in the eyes, often gritty or sandy, as if something is stuck in the eye
• Redness in the eyes
• Blurriness or reduced clarity of vision
• Tearing, or watery eyes
• A gritty or foreign-body sensation on the surface of the eye
• Swelling of the eyelids or the eye area
• Sensitivity to bright light (photophobia), often the most disabling symptom
• Headache, usually from squinting against the light
• Seeing halos around lights
• Small, constricted pupils
• Eyelid twitching
• Rarely, temporary vision loss

If you have wondered why a welder who seemed fine at the workbench can barely tolerate a phone screen, that is photophobia doing the work. The inflamed cornea cannot handle ordinary light, so the smallest task becomes painful.

What It Is Not: The Retina Is Usually Fine

In ordinary welding flash the injury is to the corneal surface, and the retina at the back of the eye is usually not involved. That is a meaningful difference from a solar-eclipse retinal burn, where intense visible and infrared light damage the retinal pigment epithelium and photoreceptors. Eclipse burns are generally considered more serious and longer-lasting, with visual changes that can persist. Welding flash sits at the front of the eye and heals completely.

Very bright arcs can still contribute to longer-term cumulative UV damage, which we return to in the long-term health section. But for the acute overnight pain most people search about, the damage is surface-level and repairable.

For Coders and Clinicians: The ICD-10 Codes

Photokeratitis carries these ICD-10-CM codes, which is why a doctor, urgent care clinic, or occupational health record may use them:

Code	Description
H16.131	Photokeratitis, right eye
H16.132	Photokeratitis, left eye
H16.133	Photokeratitis, bilateral
H16.139	Photokeratitis, unspecified eye

The key question a clinician will ask, and the one worth asking yourself, is whether both eyes are involved. Bilateral symptoms after arc work fit photokeratitis. One bad eye with severe pain is a different problem entirely, covered in the section on when to see a doctor.

So where does that leave you tonight? A temporarily damaged corneal surface, no permanent injury to worry about, and a fairly predictable 24-to-48-hour recovery. What helps most is keeping the surface moist and protected, which is exactly what the next section covers: which eye drops actually work, which are a waste of money, and which can quietly make things worse.

It also helps to know what you were welding with, since process and material choice shape both the UV output and the shade you need. Our guides to aluminum MIG welding and the advantages of stick welding cover the practical side, including shielding gas and electrode choices that affect how much ultraviolet energy an arc throws into the shop.

Which Eye Drops Actually Work (The Short Answer)

Preservative-free lubricating eye drops, sold as artificial tears, are the best over-the-counter option for welding flash. They will not heal the cornea and they cannot prevent the next exposure, but they do ease the gritty, dry, burning feeling while the surface re-epithelializes. That is the short answer, and fortunately it is also the answer that every major guideline agrees on.

The American Academy of Ophthalmology’s photokeratitis guidance lists artificial tears among the supportive measures for UV keratitis, alongside a cold washcloth over closed eyes, pain relievers as recommended by an ophthalmologist, and antibiotic eye drops if recommended. Patients are also told to avoid rubbing their eyes. The College of Optometrists clinical management guideline says roughly the same thing in different words: eye drops can be prescribed to make the eyes more comfortable while they recover.

So read every other drop on the shelf as comfort management, not repair. The cornea re-grows on its own schedule, usually within 24 to 72 hours. Your job is to make the wait tolerable and to keep yourself from complicating it. Exposure is not tied to one process, either. If your flash came off a MIG pass, the same drops apply as they would after aluminum MIG welding or any other arc work.

What to look for on the label

Buy preservative-free drops, ideally in single-dose vials you twist off and discard. The AAO’s guidance on lubricating eye drops notes that these are generally safe to use as often as needed when they contain no preservatives, while many eye doctors recommend not using preservative-containing drops more than four times a day. That limit is not arbitrary. The preservatives that keep a multi-dose bottle from growing bacteria can also sting and irritate an already raw corneal surface, which is the last thing you need when every blink feels like sandpaper.

Single-dose vials win twice: no preservative load, and no cross-contamination between eyes. Tip the vial over your eye without touching the dropper to your eye or your lashes.

The red eye relief trap

Skip the section of the aisle with the red bottles promising “maximum redness relief.” The AAO warns that these drops are actually decongestants, and they can make dry-eye symptoms worse over time. They work by constricting blood vessels, so the redness fades for a few hours and then comes back, sometimes worse. They also do nothing for grittiness, burning, or photophobia, which are the symptoms actually driving you crazy at midnight. Lubricating drops are the right tool for the job.

What a doctor might prescribe instead

If you get seen, here is what is on the table, according to EyeWiki’s photokeratitis management review:

• Topical antibiotic ointment such as erythromycin can improve comfort and may prevent bacterial super-infection. Recommended dosing is 4 times a day for 2 to 3 days.
• Topical NSAID drops (ketorolac, diclofenac) remain controversial. A 2017 Cochrane systematic review found no clear benefit for traumatic corneal abrasions, and they are not as cost-effective as oral analgesics, so routine use is not recommended.
• Cycloplegics or mydriatics such as cyclopentolate or homatropine have not been shown to be effective in corneal abrasions and are generally not recommended.

In practice, a clinician often reaches for a lubricating drop plus an antibiotic ointment, and sometimes an oral pain reliever, rather than any of the specialty drops.

Side effects and the honest limit

Artificial tears are usually well tolerated, but the AAO lists possible side effects including blurry vision and allergic reactions. If you develop itchiness, swelling, breathing problems, dizziness, or nausea, stop using the drops and see a doctor right away. Temporary blurring is common with thicker gel and ointment formulations and usually clears in a few minutes.

One more practical habit worth building now rather than at 2 a.m.: keep a small, unexpired pack of single-dose artificial tears and a sterile eye rinse in your tool bag. It costs almost nothing and it removes the temptation to reach for whatever bottle is in the truck glovebox.

First Aid for Welding Flash: The First 24 Hours

Welding flash, or photokeratitis, cannot be cured with a miracle remedy, but the first 24 hours of care will be the difference between a rough night and an unbearable one. The damage to your cornea is already done, so your goal is not to reverse it, but to protect the raw surface while it heals. Follow these steps in order starting the moment you leave the arc.

1. Get Out of the Light

The first action recommended by the American Academy of Ophthalmology is to remove yourself from all UV sources. For welders, this means ending work for the day and moving into a dim room, away from windows, plasma cutters, or any bright shop lighting.

This doesn’t need to be pitch black. Aim for low, indirect light to avoid tripping or bumping your eyes, as any impact to an injured cornea will be far more painful at this time.

2. Remove Contact Lenses

If you wear contact lenses, take them out immediately and keep them out until your cornea has fully healed. According to EyeWiki and the College of Optometrists clinical management guideline, a lens on an injured epithelium acts as friction and a potential route for infection.

Dispose of daily disposables, and if you’re using reusable lenses, do not put them back in until a qualified eye care professional confirms your eye is healed.

3. Apply a Cool Compress

Take a clean washcloth, wet it with cool water, wring it out, and lay it over your closed eyes. This is a first-line comfort measure recommended by the AAO, as it helps take the burning heat out of the eye and can relieve the swelling around the eyelids.

Never use ice or a frozen pack directly on your eye. Keep it cool, not freezing, and re-wet it as needed throughout the night.

4. Use Preservative-Free Lubricating Drops

The most practical form of relief will come from preservative-free lubricating drops, also known as artificial tears. These coat the raw corneal surface, flush loose debris, and take the edge off the gritty, sandy feeling that comes with photokeratitis.

Use single-dose vials whenever possible to avoid contamination, and feel free to use them as often as needed. Bottled drops with preservatives should be avoided for this injury.

5. Manage Pain Safely

For the deep ache behind the eyes and headache, oral pain relievers taken as directed for your own health history are the safest and most sensible option. Topical NSAID eye drops, such as ketorolac or diclofenac, are not routinely recommended for photokeratitis by EyeWiki, and their benefit for this specific injury is contested. Focus on comfort, not numbing the eye itself.

6. Strictly Avoid Rubbing and Patching

The two most common instincts are also the two most harmful. Rubbing can scrape the already loose epithelial cells across the raw surface and restart the injury. Patching is not recommended at all, as studies have shown it is not effective and can delay corneal healing. Instead, rely on cool compresses and your preservative-free drops.

Tips For The Rest of The Night

• Limit screens: Avoid phones, tablets, or bright monitors, as they will worsen light sensitivity in a dark room.
• Do not drive: Glare and reduced light tolerance can make driving at night extremely unsafe.
• Stay hydrated: Dehydration can make any dry-eye symptoms feel far more intense.
• Keep your hands busy: If the urge to rub hits, find something else to do until it passes.

Expected Timeline

As noted by EyeWiki, treatment is supportive and similar to a corneal abrasion, with the corneal epithelium typically healing within 24 to 72 hours. Pain often peaks before or during this healing window, so an increase in discomfort is not necessarily a sign of worsening injury.

By day three, most people will see major improvements, however residual grittiness or light sensitivity can linger a little longer. No contact lenses should be worn until an eye care professional confirms full healing. For those looking to avoid repeat exposures in the future, knowing when to stop and get checked is just as important as knowing when to follow a proper safe aluminum and alloy wheel repair workflow.

Prescription vs. Over-the-Counter: Comparing Every Option Honestly

Walk into any drugstore the morning after an arc flash and the eye care aisle looks like a minefield: rows of bottles, most of them red-labeled, all claiming to “relieve irritation.” The honest summary is short. The only thing you can buy without a prescription that reliably helps a welding-flashed eye is preservative-free lubricating drops. Everything else on that shelf targets a different problem, and a few make this one worse.

Every Option, Side by Side

Product	What it is	What the guidelines say	Best used for	Key cautions
Preservative-free lubricating drops (artificial tears)	Sterile solution that mimics natural tears, with no preservative added	The American Academy of Ophthalmology says lubricating drops are generally safe to use as often as needed if they contain no preservatives, and recommends them for moderate to severe dry eye and for people who use artificial tears more than four times a day	Your first and best over-the-counter option: grittiness, burning, dryness and tearing while the cornea re-epithelializes	No single brand works best for every type of dry eye, so you may need to try a few before you find your match
Preservative-containing lubricating drops	Same lubricating formula plus a preservative, often benzalkonium chloride, to keep a multi-dose bottle from contaminating	Many eye doctors recommend not using preservative-containing drops more than four times a day, since the preservative itself can irritate a sensitive eye	Short-term, occasional use, such as the first day or two while you work out what you need	If you will be dosing more than four times daily, move to preservative-free single-dose units
Lubricating gel or ointment	A thicker gel or ointment that clings to the eye and stays there longer than a drop	The AAO notes that for more severe dry eyes a lubricating ointment or gel may be needed; they last longer than regular drops but blur vision temporarily, so most people use them just before bedtime	Nighttime dryness, or grittiness that drops are not lasting long enough to cover	Temporary blurred vision, so do not drive right after application; remove before inserting contacts
Antibiotic ointment (erythromycin)	Prescription topical antibiotic ointment	EyeWiki recommends erythromycin ointment four times a day for two to three days in corneal abrasion-type injuries, the model used for photokeratitis management	Only when a clinician suspects contamination or secondary infection, particularly in contact lens wearers	Prescription only, not something to self-start, and it can itself cause blurred vision or irritation
Topical NSAID drops (ketorolac, diclofenac)	Prescription anti-inflammatory eye drops	Controversial. A 2017 Cochrane review found no clear benefit in traumatic corneal abrasions, and EyeWiki does not recommend routine use, noting they are less cost-effective than oral analgesics	Only if an eye specialist directs it	Not an over-the-counter option; oral pain relief is generally the preferred route
Cycloplegic or mydriatic drops (cyclopentolate, homatropine)	Drops that dilate the pupil and relax the focusing muscle	EyeWiki notes that cycloplegics and mydriatics are not recommended for corneal abrasion-type injuries, the same model applied to photokeratitis; they have not shown benefit here	Not for welding flash; a clinician uses these when a different diagnosis such as iritis is suspected	Dilated pupils mean light sensitivity and blurred vision, which is exactly what you do not want at 2 a.m.
“Red eye relief” decongestant drops	Vasoconstrictors such as tetrahydrozoline or naphazoline that temporarily whiten a red eye	The AAO warns these decongestant drops can make dry-eye symptoms worse over time	Not for welding flash; they are aimed at short-lived, non-UV redness	Rebound redness and worsening dryness. This is the shelf to walk past
Steroid drops	Prescription corticosteroid eye drops	Not part of standard photokeratitis management	Specialist-directed cases only	Not recommended for uncomplicated photokeratitis; any use must be directed by an eye specialist

Read down the “best used for” column and the pattern is obvious. Two products belong in your tool bag: preservative-free lubricating drops for the day and a lubricating gel for bedtime. The rest are prescription decisions, deliberate clinical choices, or outright counterproductive for UV damage.

How to Read the Label

• Look for “preservative-free” on the front panel, not buried in the ingredient list. Single-dose vials are preservative-free by design and are the easiest option when you need to dose frequently.
• Check the ingredients for benzalkonium chloride. That is the preservative most likely to irritate an already raw cornea.
• Stay out of the red “maximum redness relief” section of the aisle. Those products are decongestants, and the AAO warning about worsening dry eye applies directly to a flash-burned eye.
• Never let the dropper tip touch your eye, eyelashes, fingers or the bottle cap. A contaminated tip can reintroduce bacteria into the bottle, which defeats the purpose of a preservative-free product.
• Discard opened single-dose vials after use, and check expiration dates on anything you keep in the shop.
• Do not expect one brand to be the answer. The AAO points out that no single brand of artificial tears works best for all types of dry eye, so trying two or three is normal rather than a sign that something is wrong.

When to See a Doctor Instead of Self-Treating

Most cases of welding flash resolve on their own with the home care described earlier. But “most” is doing a lot of work in that sentence. A handful of presentations look like UV damage at first glance and turn out to be something else entirely, and a few of those need attention the same day.

The line between “wait it out” and “get seen” is easier to draw than most people expect.

How Photokeratitis Is Actually Diagnosed

There is no home test for UV damage, and you cannot diagnose your own eye by looking in a mirror. The diagnosis is clinical. According to the American Academy of Ophthalmology, a doctor diagnoses photokeratitis by asking about your recent activities, examining the eyes, and using an eye drop with fluorescein dye to look for UV damage.

That dye is the giveaway. Under a slit lamp, fluorescein stains any part of the corneal epithelium that is no longer intact. EyeWiki describes the classic finding as punctate epithelial staining of the cornea, scattered pinpoint dots that in severe exposures may become coalescent, merging into larger patches where surface cells have died. Vision may be normal or only moderately reduced, and the eye typically shows bulbar conjunctival injection and chemosis with relative sparing of the palpebral conjunctiva.

Get Seen Today: Red Flags

Book an appointment, and make it today, if any of these apply.

• No improvement after 24 to 48 hours, or symptoms lasting beyond 72 hours. Normal photokeratitis settles. Lingering symptoms mean something else is contributing.
• New or worsening pain. EyeWiki is blunt about this one: any new or worsening pain should be promptly re-evaluated.
• Reduced or changed vision. Blurring that deepens, or a shadow or haze that will not clear.
• Only one eye hurts. EyeWiki notes that a unilateral presentation should raise suspicion of a corneal or tarsal foreign body, or another cause of one-sided irritation and redness, rather than photokeratitis.
• Severe pain if you wear contact lenses. That combination carries a real risk of microbial keratitis, and it is not a wait-and-see situation.
• Thick discharge, significant swelling, or a feeling that something is stuck in the eye.

Symptoms that improve and then come back also deserve a look. That pattern usually means the original trigger is still there.

Why Self-Diagnosis Fails

EyeWiki lists the differential for bilateral red, irritated, photophobic eyes, and it is a long list. Knowing it is the reason self-treatment fails so often.

• Viral conjunctivitis. Usually begins in one eye and involves the palpebral conjunctiva, whereas photokeratitis tends to spare it.
• Contact lens overwear. Can mimic the exact burning, watering and light sensitivity you get from UV.
• Dry eye. Common, treatable, and easily blamed on welding flash when it is really the other way round.
• Topical drug toxicity. Including preservatives and drugs such as brimonidine, neomycin, and tobramycin.
• Chemical exposure. Cleaning sprays and oven cleaners produce redness and irritation that can be mistaken for arc flash.
• Upper eyelid foreign body. A speck trapped under the lid causes persistent irritation that no amount of lubricating drops will fix.

What to Say and What to Bring

Write the details down before you go. The most useful facts are the exposure time, the welding process, the amperage, and the protective equipment you were actually wearing that day. On aluminum work, amperage can move fast during setup, which makes the process detail worth noting, especially if you were running aluminum flux core welding or a similar wire process. If you have the welding procedure specification, the cut list, or a photo of the setup, bring it.

Expect the visit to include a history, a visual acuity check, a look at the front of the eye, and fluorescein staining. What gets prescribed depends on what they find: antibiotic ointment such as erythromycin for the epithelial defect, lubricants for comfort, and occasionally other agents if the picture points somewhere else. EyeWiki recommends arranging follow-up with an ophthalmologist within one to two days of the initial diagnosis to confirm that signs and symptoms are resolving.

Prevention: Helmet Shades, ANSI Z87.1, and PPE That Works

Here is the honest truth about welding flash: no eye drop prevents it. The only reliable fix is keeping ultraviolet light out of your eyes before the arc is struck, which means a helmet, the right shade and keeping it on.

It is also one of the few workplace injuries in metal fabrication that is essentially 100 percent preventable with gear you can buy today.

The Legal Backbone: What OSHA Actually Requires

In the United States, eye and face protection in welding is a regulation, not a best practice. 29 CFR 1910.133 is the governing standard, and three clauses do the heavy lifting.

• 1910.133(a)(1) puts the obligation on the employer: each affected employee must be provided appropriate eye or face protection when exposed to eye or face hazards, including potentially injurious light radiation. Arc welding is the textbook case.
• 1910.133(b)(1) sets the technical bar: protective eye and face protection devices must comply with ANSI/ISEA Z87.1-2010. Older editions, Z87.1-2003 and Z87.1-1989, are also accepted, which explains older stampings on used helmets.
• 1910.133(a)(3) is the clause most people forget. Prescription lenses worn during eye-hazard work need protection that incorporates the prescription or fits over them without disturbing them. Over-glasses welding shields exist for exactly this.

Minimum Protective Shade Numbers

These are OSHA minimums. Treat them as floors, not targets.

Process	Minimum Shade	Current Range
Shielded metal arc welding (SMAW)	7	Under 60 A
SMAW	8	60 to 160 A
SMAW	10	160 to 250 A
SMAW	11	250 to 550 A
Gas metal arc welding (GMAW/MIG) and flux cored arc welding (FCAW)	7	Under 60 A
GMAW/MIG and FCAW	10	60 A and above
Gas tungsten arc welding (GTAW/TIG)	8	Up to 150 A
GTAW/TIG	10	150 to 500 A
Air carbon arc welding	10	Light
Air carbon arc welding	11	Heavy
Plasma arc welding	6/8/10/11	By current, lightest to heaviest
Plasma arc cutting	8/9/10	Light/medium/heavy
Carbon arc welding	14	All
Gas welding	4/5/6	By plate thickness
Oxy-fuel cutting	3/4/5	By plate thickness

OSHA’s rule of thumb: start one shade too dark to see the weld zone, then move lighter until the joint stays clear. Never drop below the minimum.

Amperage drives light output hard, so see our guides to advantages of stick welding and aerospace TIG welding.

Auto-Darkening Helmets and Their Failure Modes

An auto-darkening helmet switches the filter from clear to dark the moment the arc strikes, which beats a fixed-shade unit when you change processes or amperage mid-shift. It also has failure modes, and each one ends with UV in somebody’s eyes.

• Slow response at low amperage. On TIG at 20 to 40 A the sensor may not trigger in time, so the filter darkens after the arc runs.
• Poor sensor calibration. A unit set for a 250 A shop lags badly on a 30 A job. Use a helmet per amperage range.
• Scratched or pitted lens. UV protection comes from the filter material, not the tint, and a scratched lens scatters light.
• Dead battery. Solar-plus-battery designs can fail to darken when the cell is flat and the arc light is weak.
• Faded filter. Filters left in a truck bed or hot trailer for years lose contrast and, in some cases, protection.

Laser and hybrid processes have their own shade rules; see our guide to alpha laser welding systems, uses, and safety.

Clear Safety Glasses Are Not a Welding Helmet

Clear safety glasses on the bench are the most common reason repeat flash injuries happen. An ANSI Z87.1 safety glass protects against chips and impact, not arc radiation, and ANSI requires a minimum filter shade of 8 in the visible range.

Side protection matters too. 1910.133(a)(2) requires it where flying objects are a hazard: grinding sparks, slag spatter, wire whip, cut-off fragments.

NIOSH’s eye safety guidance advises fitting eye protection for proper coverage, comfort and peripheral vision, plus a hazard assessment and eyewear that meets current safety standards. It also notes welders can suffer thermal burns that damage the eyes and surrounding tissue. EyeWiki’s photokeratitis guidance echoes that: UV-exposed workers such as welders should follow ANSI standards and use a full face shield with adjustable shade levels.

The Secondhand Exposure Problem

The person who gets hurt is often not the one holding the torch. An assistant holding a part, a coworker passing the booth, a grinder two tables over. UV does not stop at the weld table.

Everyone exposed needs their own rated protection: a face shield for grinding, a rated helmet with the correct shade for arc work, side protection where spatter flies. Our guides to aluminum cleaner for welding and air arc welding and carbon arc gouging cover what some processes add.

A PPE Plan That Actually Holds Up

Match the shade chart to every process and amperage you run, then write the numbers on the machine or the cart.

1. Match shade to process and amperage. Stick and MIG off one cart? Carry shades covering both minimums.
2. Keep the hood down. Tipping up to see the joint causes most flash cases.
3. Replace scratched lenses on a schedule, not on failure. A filter has a service life.
4. Carry a spare helmet. Filter failures happen mid-shift.
5. Train on secondhand exposure. Include assistants, helpers and passers-by.
6. Check the fit. Headbands, hat compatibility, brow and cheek coverage.

For the equipment side, our Airgas welding equipment guide covers the gear and consumables around the helmet, and AllGas welding supply overview helps you stock a compliant station.

Once the hood, the shade and the second pair of eyes are handled correctly, welding flash essentially stops happening. That is a far better outcome than anything you can pour into your eyes at midnight.

Common Mistakes That Ruin Recovery (and the Next Exposure)

Welding flash stories all follow the same arc: the exposure happens, the pain shows up hours later, and small, avoidable decisions turn a rough night into a rough week. These are the errors that repeat in shops, bays and garages, each with the fix that works.

Rubbing the eyes

It is the reflex, and the worst thing you can do to an inflamed cornea. The American Academy of Ophthalmology advises against rubbing while the eye heals, because the corneal surface is raw and mechanically fragile. Rubbing grinds dead cells and debris across the epithelium.

Fix: a cold washcloth over closed eyes and preservative-free lubricating drops. Let the drops flush a foreign feeling instead of using your knuckle.

Leaving contact lenses in

Contacts sit on the damaged surface, trap debris and bacteria, and carry their own preservatives. EyeWiki says to stay out of contacts until the cornea has healed, and the College of Optometrists clinical guideline stresses removing them immediately after an exposure. Sleeping in your lenses is a separate, more serious problem needing a same-day exam.

Fix: lenses out now and for the whole recovery window. Keep a backup pair of safety glasses so the habit sticks.

Grabbing the wrong drops

Redness relievers are decongestants, and the AAO warns they can make dry eye worse over time. A photokeratitis eye is already a dry eye with a damaged surface, so drying it further is the opposite of what you want. AAO guidance on lubricating eye drops notes many eye doctors advise against preservative-containing drops used more than four times a day, because preservatives irritate plenty of people. Preservative-free drops are safe as often as needed.

Fix: lubricating drops, ideally single-dose preservative-free units. If a preserved bottle is all you have, cap it at four applications a day and space them out.

Assuming it is just conjunctivitis

This mistake costs the most time. A week of self-treating “pink eye” is a week of untreated corneal damage. EyeWiki lists a differential that includes viral conjunctivitis, contact lens overwear, dry eye, topical drug toxicity (including sensitivity to brimonidine, neomycin, tobramycin and preservatives), chemical exposure from cleaning sprays and oven cleaners, and upper eyelid foreign body.

Fix: get a fluorescein exam, and a doctor confirms the diagnosis in minutes. EyeWiki advises follow-up within one to two days, and any new or worsening pain should be re-evaluated promptly.

Home remedies, leftover drops and shared bottles

Milk, baking soda, antiseptic, homemade rinses and that steroid bottle left over from a tendonitis prescription belong nowhere near an injured cornea. Steroids can mask infection and worsen a corneal ulcer, and household cleaner chemicals mimic photokeratitis symptoms. Sharing one bottle between two welders, or letting the tip touch an eye or lid, invites bacteria or a scratch. Skip any label promising to “instantly relieve pain,” “heal wounds” or a “steroid formula”: no over-the-counter drop does those things, and steroid drops are prescription-only.

Fix: sterile saline or artificial tears only. Single-dose vials where possible, one eye per bottle, tip never touches anything, cap back on immediately after use.

Habits that set healing back

• Patching the eye. EyeWiki notes patch therapy is not recommended for corneal abrasions because it delays corneal healing, and photokeratitis is a corneal epithelial injury.
• Driving at night or welding again while photophobic. Glare and reduced acuity are hazards on their own, and halos around every headlight turn a minor eye injury into a car wreck. Another arc exposure on an unhealed cornea restarts healing.

Fix: cool compress and drops instead of a patch, no re-exposure or night driving until light sensitivity and acuity are back to normal, sunglasses and the slow route if you must drive.

Under-fixing the cause

The eye heals. The setup that caused it does not. Repeat cases almost always trace back to these faults, each a ten-minute fix with the right part in your truck:

• Scratched or pitted filter lens no longer filtering UV
• Shade number too light for the process and amperage
• Auto-darkening helmet that will not darken at low amperage, from a poor sensor or dead battery
• Hood tipped up to “see the joint” on a hot pass
• Helper standing nearby without rated protection
• No side shields, so spatter and UV come around the sides
• Dusty or fogged lens wiped with a bare hand or grimy rag, scratching it

Fix: run the OSHA shade table against your amperage before the next job, keep a spare filter and battery on the truck, and treat a scratched lens as a replacement trigger. OSHA requires eye and face protection meeting ANSI/ISEA Z87.1 under 29 CFR 1910.133, and NIOSH stresses proper fit for coverage and peripheral vision.

Shade requirements follow amperage, and process changes can push a welder higher than expected. Our guides to aluminum MIG welding and all position welding rod selection explain the setup that drives heat input, while prepping aluminum correctly avoids the hotter, longer pass that forces a darker shade.

Read the labels, follow the fixes above, then check the equipment. The drops get you through 48 hours. Only the PPE prevents the next one.

Real Scenarios From the Shop Floor

Every case of welding flash starts a few hours before the pain does. The six scenarios below are composites from shop patterns, not accounts of specific people.

Scenario A: The Apprentice With the Tipped-Up Hood

A second-year apprentice runs 3/8-inch stick on a hotter-than-expected pass. He tips the hood back to watch the puddle, finishing the joint with his face in the arc’s light. Nothing hurts then. At 11 p.m. his eyes water and the hallway light feels like a headlight.

That amperage falls where OSHA’s shielded metal arc table calls for shade 10, and the tipped hood let unfiltered UV straight in. The fix is the correct shade, the hood fully down, then cold compress and preservative-free lubricating drops. Watching the puddle is a shield decision, not just a technique one, part of why SMAW keeps its fans.

Scenario B: The Assistant in Clear Safety Glasses

A fabricator works a hot pass while an assistant stands outside the arc radius in clear safety glasses. He is not holding the torch, so nobody thinks of PPE. He wakes with the same pain, tearing and light sensitivity as the welder.

Clear lenses are not rated welding protection. OSHA 1910.133(a)(1) applies to every affected employee exposed to injurious light radiation, not only the person holding the rod. Bystanders need a rated helmet of their own, or a filtered face shield positioned so the arc cannot reach their eyes.

Scenario C: The Faded Auto-Darkening Filter

A TIG shop keeps one auto-darkening helmet at the bench. The filter is scratched, the tint faded to pale grey, and at 40 amps it barely darkens. The welder compensates by holding the torch farther away, then finishes with a headache and gritty eyes.

Scratches and sun-bleached filters cut sensitivity, dead batteries and miscalibrated sensors delay the switch, and a helmet that never darkens is functionally a clear shield. Replace the filter, test the sensor at your real amperage, and keep a known-good spare. For the technique side, see our TIG standards and shop practice guide.

Scenario D: The Face Shield That Was Lifted for Grinding

A maintenance tech grinds stainless, the face shield fogs within a minute, so he props it up and works with it off his face. By evening his eyes are red, gritty and streaming, with the deep ache of a UV hit.

Grinding throws hot sparks and UV, so the answer is a shield suited to the job: a properly fitted face shield rated for grinding, with the correct filter and eye protection underneath. NIOSH notes that eye protection selection depends on the nature of the hazard, the exposure circumstances, other protective equipment in use and personal vision needs. If fogging is the problem, fix the fit and ventilation.

Scenario E: One Helmet, Two Jobs

A home hobbyist has one fixed-shade helmet for everything. It is shade 10, so on a 20-amp TIG pass the weld is nearly invisible and he starts lifting the hood to check the puddle. Later he uses the same helmet on 90-amp MIG, where shade 10 is exactly right.

The OSHA table settles it: gas tungsten arc wants shade 8 below 50 amps, gas metal arc wants shade 10 at 60 amps and above. No fixed shade serves both, which is why auto-darkening helmets became standard. Match shade to process and amperage. For aluminum hobby work, the aluminum MIG guide covers the filler and shielding changes the alloy brings.

Scenario F: The Same Condition From a Different Source

Welding is not the only route to photokeratitis. EyeWiki lists arc welding, snow reflections, solar exposure, sun lamps, tanning beds, germicidal and laboratory UV lights, halogen lamp bursts and damaged metal halide lamps. The metal halide case is documented: outbreaks in two Philadelphia gymnasiums in 2011 and 2013, reported in CDC’s MMWR by Finn and colleagues in 2016. A failing lamp does the same to a whole crew.

Outdoor sources work the same way. Fresh snow reflects up to 90 percent of the light hitting it, which is why skiers get snow blindness, and UV rises at altitude where the air is thinner. The diagnosis is the same fluorescein stain and the treatment the same drops and time. Cumulative UV exposure is associated with pterygium, erythema, malignant melanoma and non-melanotic skin cancers, while the American Academy of Ophthalmology lists cataracts, eye cancers and pterygium growth among UV-related risks.

What changes with the source is the prevention: rated shade and side protection for the welder, rated protection for the helper, working auto-darkening filters, and treating every UV source as a hazard. If your symptoms don’t match, the AAO’s photokeratitis overview lists the signs to look for and when to be examined.

Healing Timeline, Long-Term Eye Health, and Reporting the Incident

Most people searching for help with welding flash are not asking about the next four hours. They are asking something bigger: is this going to be okay, and is it going to keep happening? Here is the recovery calendar, the long-term picture, and the paperwork that follows.

The Healing Timeline, Hour by Hour

Welding flash runs on a strange clock. The damage happens immediately, but symptoms lag hours behind it, which is why so many welders finish a shift feeling fine and then fall apart in the middle of the night.

Window	What is happening	What you will notice
Hours 0–6	UV radiation kills epithelial cells on the cornea. No inflammation yet, no exposed nerves.	Nothing, usually. Eyes may even feel fine, which is exactly when the mistake happens: you keep welding.
Hours 6–12	Dead cells begin to slough off. The College of Optometrists clinical management guideline puts typical onset in this window, ranging from about 30 minutes to 12 hours depending on dose.	Pain building like a headache behind the eye, tearing, redness, blurry vision, and the classic sand-in-your-eyes feeling.
Hours 12–48	The worst of it. EyeWiki notes the corneal epithelium should heal within 24–72 hours, with supportive treatment continued until re-epithelialization.	Peak pain, photophobia, small pupils, halos around lights, swollen lids. Symptoms usually resolve in 24–48 hours.
Days 3–7	Epithelium re-grown and nerve endings settling, though sensitivity can lag healing.	Residual light sensitivity and grittiness, worst at the end of the day. Vision near baseline and improving every 24 hours.

The frustrating part: pain peaks before the surface has re-grown, because nerves are exposed while the new layer forms. That is when lubricating drops help most. They do not heal anything. They cut friction and dryness on a raw surface while biology does the repair.

Long-Term Eye Health: One Incident vs. a Career of UV

One episode is, reassuringly, not a permanent injury. Once the epithelium re-epithelializes, vision returns and that single exposure leaves no lasting structural damage.

Cumulative exposure is a different story. EyeWiki, citing Tenkate and colleagues from 1999, notes that increased lifetime ultraviolet exposure can lead to pterygium, erythema, malignant melanoma, and non-melanotic skin cancers. The American Academy of Ophthalmology lists cataracts, eye cancers, growths on the eye such as pterygium, and sunburn to the eye among UV risks. Cataracts are the one most people eventually develop, and nobody gets one at a set age because of one bad shift. It is the sum.

• Get a baseline eye exam if you weld regularly. It records what your eyes look like before decades of exposure and gives you a reference point if something changes later. Annual checks make sense for full-time welders.
• Wear UV-rated protection every shift, not only on the days it hurts. Pain is what makes people take protection seriously, and pain is the wrong metric. You cannot feel the exposure building toward cataract.

Same logic as good protective equipment habits across a shop: the controls that matter are the ones you use on a boring Tuesday.

Reporting the Incident

Report it to your supervisor and safety officer so the specific failure gets fixed. Arc eye almost always traces back to something concrete: a shade number too light, an auto-darkening filter that quit working, a hood tipped up, a scratched lens, or a helper standing in the arc path with no rated protection.

For the paperwork, 29 CFR 1904.7 requires a work-related injury on the injury and illness log when it causes death, days away from work, restricted work or job transfer, medical treatment beyond first aid, or loss of consciousness. One detail people get wrong: 1904.7(b)(5)(ii)(A) counts a non-prescription medication at non-prescription strength as first aid, so it stays off the log. But medication recommended at prescription strength, or prescribed eye drops, is medical treatment and becomes a recordable case.

So for a welder with arc eye: over-the-counter lubricating drops on your own are first aid. Prescription drops or an ophthalmology visit are medical treatment, and your employer needs to know.

When to Go Back to Work

Do not weld or grind again until light sensitivity and visual acuity are back to normal, not merely improved. Discomfort fades before the visual system settles, and residual glare and blur are hazards on their own. Reduced acuity near a molten pool is a burn and a scrap waiting to happen.

That logic applies every shift, not just after an incident. OSHA’s eye and face protection overview notes that thousands of people are blinded each year from work-related eye injuries that proper selection and use of protective equipment would have prevented. Eye drops handle a symptom. The helmet, the correct shade, and side protection handle the cause.

A welding flash is miserable, genuinely miserable, but for a first-timer it is a well-behaved injury: it heals, it leaves no trace, and it is almost always the last time.

Bottom Line: A Simple Welding Flash Care Plan

Here is the short version. For the pain, grittiness and dryness of welding flash, preservative-free lubricating eye drops (artificial tears) are the best over-the-counter choice, used frequently while the cornea heals, which typically takes 24 to 72 hours. Nothing you put in your eye prevents the next exposure, and nothing you put in your eye undoes the last one. That is the honest answer, and it is more useful than it sounds.

It is worth remembering why this is comfort, not cure. The College of Optometrists clinical management guideline describes photokeratitis as damage to corneal epithelial cells caused by unprotected ultraviolet exposure, and notes it usually resolves within 24 to 48 hours. The American Academy of Ophthalmology puts it plainly: photokeratitis and snow blindness usually go away on their own, and treatment focuses on making you feel better while your eyes heal.

Step 1: Right Now

Run this list in the next ten minutes.

• Get out of the light. Dark room, curtains closed, no UV sources, which is exactly the AAO guidance to leave the sun for a dark room.
• Cool compress. A cold washcloth over closed eyes for a few minutes at a time.
• Preservative-free lubricating drops. Frequent, small doses. The AAO says lubricating drops are generally safe as often as needed if they contain no preservatives.
• No rubbing. It makes exposed nerve endings angrier, not better.
• Contacts out, and they stay out until the cornea has fully healed.
• Oral pain relief if it suits you and your doctor has cleared it. Topical NSAID drops are not the preferred route.
• No night driving while you are photophobic. Glare and reduced acuity are hazards, on the road and in the shop.

Step 2: Know When to Get Seen

Book an optometrist or ophthalmologist if any of these are true, ideally within one to two days.

• It is not clearly improving after 24 to 48 hours, or it lasts beyond 72 hours.
• The pain gets worse instead of better.
• Your vision changes, blurs, or develops halos that do not settle.
• Only one eye hurts. A single sore eye points more toward a foreign body than UV damage.
• You wear contact lenses and the pain is severe, which raises the concern of a corneal infection.

A clinician will check your eyes and use a fluorescein dye drop to look for the characteristic punctate staining of UV damage. It is quick, painless, and it separates real photokeratitis from the look-alikes.

Step 3: Prevention, Which Is the Real Fix

EyeWiki calls photokeratitis a preventable disease with proper UV protection, and it is right. OSHA 29 CFR 1910.133(a)(5) requires employers to ensure workers use filter lenses with a shade number appropriate for the work being performed, protecting against injurious light radiation. For the welder on the floor, that means:

• A welding helmet rated to ANSI Z87.1, set to the OSHA minimum shade for your process and amperage.
• Side protection on the helmet, plus rated eyewear for helpers and bystanders.
• A replacement plan for scratched or pitted filter lenses, and a spare auto-darkening filter in the toolbox.
• A habit of keeping the hood down, even when you think you can peek over the top.

Shade numbers matter whichever process you run, whether you are picking up the basics in our guides to all-position welding rods and the advantages of stick welding.

Step 4: Treat UV as a Career Exposure

One episode of welding flash heals. Cumulative UV exposure is a different story, and it is why daily protection matters on the days nothing hurts. The AAO lists cataracts, eye cancers and pterygium growths among UV-related eye risks. Get a baseline eye exam if you weld regularly, and wear rated protection every single shift.

Then pick the right shade for your amperage and put the helmet back on. The condition is miserable, but usually temporary, and a welder who learns the shade table once typically never sees it again.

For more shop safety, see our guides to aerospace welding standards, air arc welding and carbon arc gouging safety and alloy steel welding electrode safety. For gear, the OSHA eye and face protection overview and NIOSH eye safety guidance are worth bookmarking.

Frequently Asked Questions

Which eye drops are safe to use after welding flash?

Preservative-free lubricating eye drops (artificial tears) are the best over-the-counter option, because they soothe the dryness and grittiness while the cornea re-epithelializes. Preservative-free drops are generally safe to use as often as needed, whereas many eye doctors advise against using preservative-containing drops more than four times a day. Avoid ‘red eye relief’ drops — they are decongestants and can make dry-eye symptoms worse over time.

How long after welding does welding flash start?

Symptoms usually appear 6–12 hours after the exposure, and can start as early as 30 minutes in some cases. That delay is what catches people out: you can leave a shift feeling fine and wake up at midnight in agony. The delay happens because the corneal epithelial cells absorb the UV, die, and then slough off hours later, exposing the nerve-rich layer underneath.

How long does welding flash last?

For an uncomplicated exposure, symptoms typically resolve within 24–48 hours, and the corneal epithelium should heal within 24–72 hours. Residual light sensitivity and grittiness can linger a little longer. If pain is worsening or has not clearly improved after 48 hours, arrange an eye examination.

Can I use eye drops before welding to protect my eyes?

No. There is no eye drop that blocks ultraviolet radiation, and there is no drop that prevents photokeratitis. Protection comes entirely from PPE: an ANSI/ISEA Z87.1-rated welding helmet with the correct filter shade for your process and amperage, side protection, and rated eye protection for anyone working nearby.

I wear contact lenses — should I keep them in?

No. Remove them immediately and stay out of them until the cornea has fully healed, because a damaged corneal surface plus a contact lens raises the risk of a serious infection. The College of Optometrists’ clinical guideline specifically highlights ceasing contact lens wear until photokeratitis has fully healed.

When should I see a doctor for welding flash?

See a clinician if pain is not clearly improving within 24–48 hours, if the pain worsens, if vision changes, if only one eye is affected, if there is discharge, or if you are a contact lens wearer with severe pain. EyeWiki advises follow-up within one to two days of an initial diagnosis, and any new or worsening pain should be re-evaluated promptly.

Does welding flash cause permanent eye damage?

A single episode of photokeratitis is usually temporary and does not leave permanent damage. The bigger concern is cumulative UV exposure over a career, which is linked to pterygium, cataracts, eye cancers and skin cancers — so treat UV protection as an everyday requirement, not just a fix for a painful episode.

Are ‘welding flash’ and ‘arc flash’ the same thing?

No. Welding flash (arc eye, photokeratitis) is ultraviolet injury to the cornea from the arc’s light. Arc flash is a different event — an electrical arc that releases intense heat and light, which causes thermal burns and can be much more serious. Eye drops are relevant to the UV symptoms of welding flash, not to the thermal and electrical injuries of an arc flash.

Can I go back to work and weld again the next day?

Only if your vision and light sensitivity are back to normal. Residual glare, blur and reduced acuity are hazards in a fab shop, and another UV exposure before the surface has re-epithelialized will set your recovery back. Report the exposure and the PPE failure to your supervisor so the helmet, shade or lens gets corrected.

What do I need in a welding first-aid kit for eye injuries?

Keep single-dose, preservative-free artificial tears, a sterile eye-rinse or saline, a clean cold pack or cloth for compresses, and a spare pair of side-shield safety glasses. Many jobsites also stock an eyewash station for chemical exposures. Keep everything sealed, in date, and stored so the drop tips never touch anything.